Serverless Notification System

Context & Goals

Event-driven serverless notification pipeline on AWS — Lambda, SQS, SNS, DynamoDB, and Cognito with full Infrastructure-as-Code via AWS SAM and zero-touch CI/CD through GitHub Actions.

Constraints & Challenges

High-volume notification delivery systems require decoupled, fault-tolerant pipelines that can scale to millions of events without manual intervention. Traditional server-based approaches struggle with cost and operational overhead at scale.

Solution & Approach

Built a fully serverless pipeline where SQS queues decouple producers from consumers, Lambda functions handle processing, and SNS fans out to multiple channels. Dead Letter Queue with 3-retry logic ensures no notification is silently dropped. Full IaC with AWS SAM keeps infrastructure reproducible, and GitHub Actions deploys on every merge.

Production-ready serverless notification system with DLQ-backed retry logic, Cognito-secured API endpoints, DynamoDB for delivery tracking, and automated CI/CD. Zero servers to manage, scales automatically, and costs near-zero at low volume.

Technology Stack

Results & Impact

• →Fully serverless — zero infrastructure to manage, auto-scales with load
• →DLQ with 3-retry logic — no notifications silently dropped
• →Full IaC with AWS SAM — infrastructure reproducible from a single command
• →Zero-touch CI/CD via GitHub Actions on every merge to main

Project Links